Sister Mary Henry Simoneaux was born Marguerite Marie Simoneaux to Henry Paul Simoneaux and Rita Cecile Blanchard in Plattenville, LA, on September 25, 1922. She was the youngest of four children; Eileen Cecile, Henry Paul (who lived only a few hours); and Lillian Therese. Sister attended four years of grammar school at Plattenville. In October of 1932 after her father died the family moved to New Orleans where she attended St. Alphonsus School staffed by the Sisters of Mercy. She later attended Redemptorist Girls High School, also staffed by the Sisters of Mercy. Sister received her M.E.D. degree at Loyola University, New Orleans, LA.Sister felt God's providence had inspired her in her early childhood to want to become a Sister of Mercy. Sister left New Orleans for Webster Groves, MO to enter the Religious Sisters of Mercy on September 8, 1939. She made her first profession of religious vows on March 12, 1942, in Webster Groves, MO and her final vows with the Sisters of Mercy on August 16, 1945.Sister began her education ministry in 1942 and has ministered over 63 years with her skills of teaching and as a principal. Sister was missioned as a teacher at St. Alphonsus, Holy Name of Jesus, and Mercy Academy in New Orleans, LA; She became teacher and principal at Our Lady of Perpetual Help in Kenner, LA; St. Joseph School in Jeanerette, LA; Mother of Mercy in St. Martinville, LA; Immaculate Conception; and Trinity Junior High in Fort Smith, Arkansas; and Mercy High School in St. Louis, MO. Sister later began volunteer teaching from 1992 to 2005 at Our Lady of Perpetual Help School in Kenner, LA Sister Henry retired at Mercy Health Center Convent in Oklahoma City, OK on February 18, 2019. Throughouther life sister was willing to help where needed and she was always supportive, considerate, and compassionate to her family, lifelong friends, Community members, and Convent Co-workers. She was continually active in her faithful ministry of prayer and Community spiritual events. Sister enjoyed Community activities and graciously extended hospitality to all.She was preceded in death by her parents and one brother: Henry Paul Simoneaux and two sisters: Eileen Cecile Simoneaux Frey and Lillian Therese Simoneaux Menendez. Immediate survivors include many beloved nieces, nephews and their families, Sisters of Mercy, co-workers, friends, former students, Mercy Associates, compassionate physicians, and caregivers.Memorials may be extended for masses, Sisters of Mercy Retirement Convent, 4300 W. Memorial Rd., Oklahoma City, OK 73120-8304. Mass of Christian Burial on May 3, 2022, at Mercy Health Center Convent, OKC and burial at Resurrection Cemetery.